在电火花穿孔加工时,抽油比冲油稳定,且污油和分解气体不通过已加工区而直接由预加工腔排走,二次放电和拉弧现象较之冲油加工大大改善。但是,抽油时工作液分解的可燃气体在预加工腔囤集,且紧靠火花密集的加工区,一旦气体点燃则发生爆炸,即所谓“放炮”。笔者采用一种简单的通用油杯(如图),收到良好的效果,供大家参考。这种油杯采用抽油法,油杯在工作时是封闭的,负压抽吸管用螺口联接到工具凸模上,煤油在火花区分解的气 In the EDM perforation processing, the pumping oil than the stable, and the oil and gas decomposition did not pass through the processing zone directly discharged from the pre-processing chamber, secondary discharge and arc phenomenon than the red oil processing greatly improved. However, combustible gases, which are decomposed by the working fluid during pumping, are collected in the pre-processing chamber and are located close to the spark-intensive processing zone. Once the gas ignites, an explosion occurs, which is called “blasting.” I use a simple universal cup (pictured), received good results for your reference. This oil cup using sucker method, the oil cup is closed at work, negative pressure suction pipe screwed to the tool punch, kerosene in the spark zone decomposition gas